Large Diamond Inclusion in Diamond
A fascinating diamond crystal inclusion displaying a transparent, ghost-like appearance is identified in a Faint green diamond.
Diamonds from Guyana, Ekanite from Sri Lanka, a New Amber Source in Vietnam, and More...
An overview of the Summer 2022 Gems & Gemology content.
Unusual Glass-and-Quartz Triplet Imitation of Emerald
An extremely convincing imitation of emerald is examined in Beijing.
Three-Rayed Asterism in Quartz
Rare optical phenomenon observed in four star quartz cabochons from Brazil.
GIA 任命 Johanna Levy（约翰娜·利维）为环境、社会和治理项目副总裁
作为宝石学研究、教育以及以科学为基础的宝石鉴定与分级服务方面的领导者，GIA 目前正在积极拓展宝石原产地服务，致力于向零售商和消费者提供所需的钻石产地信息。
GIA 报告将于 2025 年实现数字化
作为宝石学研究、教育以及以科学为基础的宝石鉴定与分级服务方面的领导者，GIA 目前正在积极拓展宝石原产地服务，致力于向零售商和消费者提供所需的钻石产地信息。
Deep-Focus Earthquakes: The Heartbeat of a Diamond Factory?
The first installment of this column explores the potential role of modern-day deep-focus earthquakes on diamond growth.
Complex Fluid Inclusion in Topaz
A blue topaz recently examined by the authors contained an interesting and complex fluid-filled negative crystal that revealed some remarkable behavior when cooled down.
Mercury Free Mining Pilot Program
Stephen M. Avery: Celebrating Half a Century in Gem Cutting
Approaching his 50th anniversary in the business, Stephen M. Avery (Lakewood, Colorado) reflected on his journey to becoming an award-winning lapidary artist, detailing his signature cuts and gem sets and offering advice to up-and-coming gemstone cutters.
Yellow Topaz from Germany, Emerald Mining in Austria’s Habachtal Region, a Return to Tucson, and More…
An overview of the Spring 2022 Gems & Gemology content.
Blue Sapphire Lord of the Rings Pendant
After 15 years in the making, Jeffrey Bilgore’s stunning blue sapphire pendant makes its debut at the AGTA show.
Custom Knives by Loren Feldman
Custom knife maker Loren Feldman details his craft, including his use of rare and fascinating materials such as gem dinosaur bone and meteorites.
Skull Carved of Meteorite
Four-billion-year-old meteorite carved into a life-sized human skull draws attention at the 2022 AGTA show.
Tucson 2022 Overview
Sellers and buyers alike were delighted to be back at Tucson for the show season after a two-year absence.
Gem Topaz from the Schneckenstein Crag, Saxony, Germany: Mineralogical Characterization and Luminescence
Characterizes yellow topaz from this historical source, with particular emphasis on its photo luminescence behavior.
History of Emerald Mining in the Habachtal Deposit of Austria, Part II
The finale of a two-part series on the mining history of Austrian emerald deposits in the Habachtal region.
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